wav

How to encode a WAV to a mp3 on a Android device

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Pure Java Look into Tritonus’s clean room implementation of javasound which offers an MP3 encoder plugin here: http://www.tritonus.org/plugins.html Secondly, I would suggest looking into jzoom’s libraries JLayer or JLayerME: http://www.javazoom.net/javalayer/javalayer.html (this may only be decode, not sure) If those doesn’t suit your need you can look at this article from 2000 about adding MP3 capabilities … Read more

How to handle Uncaught (in promise) DOMException: The play() request was interrupted by a call to pause()

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For Chrome they changed autoplay policy, so you can read about here: var promise = document.querySelector(‘audio’).play(); if (promise !== undefined) { promise.then(_ => { // Autoplay started! }).catch(error => { // Autoplay was prevented. // Show a “Play” button so that user can start playback. }); }

What do the bytes in a .wav file represent?

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You will have heard, that audio signals are represented by some kind of wave. If you have ever seen this wave diagrams with a line going up and down — that’s basically what’s inside those files. Take a look at this file picture from http://en.wikipedia.org/wiki/Sampling_rate You see your audio wave (the gray line). The current … Read more

Writing musical notes to a wav file

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You’re on the right track. Let’s take a look at your example: for(int i = 0; i < data.Length; i++) data[i] = (byte)(256 * Math.Sin(i)); OK, you’ve got 11025 samples per second. You’ve got 60 seconds worth of samples. Each sample is a number between 0 and 255 which represents a small change in air … Read more

How to play .wav files with java

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Finally I managed to do the following and it works fine import java.io.File; import java.io.IOException; import javax.sound.sampled.AudioFormat; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.DataLine; import javax.sound.sampled.LineUnavailableException; import javax.sound.sampled.SourceDataLine; public class MakeSound { private final int BUFFER_SIZE = 128000; private File soundFile; private AudioInputStream audioStream; private AudioFormat audioFormat; private SourceDataLine sourceLine; /** * @param filename the name … Read more

Playing .mp3 and .wav in Java?

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Java FX has Media and MediaPlayer classes which will play mp3 files. Example code: String bip = “bip.mp3”; Media hit = new Media(new File(bip).toURI().toString()); MediaPlayer mediaPlayer = new MediaPlayer(hit); mediaPlayer.play(); You will need the following import statements: import java.io.File; import javafx.scene.media.Media; import javafx.scene.media.MediaPlayer;